Preparation method and application of modified composite pigment yellow

A composite pigment and modification technology, which is applied in the field of preparation of modified composite pigment yellow, can solve the problems of affecting the modification effect, low bonding stability, easy separation, etc., and achieve the effect of preventing secondary aggregation

Inactive Publication Date: 2018-10-09
ANHUI HUAHUI SUYE TECH SHARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these inorganic substances use inorganic nano-materials such as sepiolite and palygorskite, but the combination stability of such inorganic substances and organic pigments is not high in the encapsulation modification, and they are prone to separation, which affects the modification effect
In addition, when using inorganic nano-materials for modification, the particle size of the inorganic core cannot be controlled. When the particle size of the inorganic core is small, the composite pigment particles will also undergo secondary aggregation during the preparation process.

Method used

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  • Preparation method and application of modified composite pigment yellow
  • Preparation method and application of modified composite pigment yellow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) put 16.2gFeCl 3 , 24.2gFe(NO 3 ) 3 Add it into purified water, stir at 50-60°C until completely dissolved, add 4g NaOH, stir at 80-90°C for 1 hour, a large amount of colloids are precipitated in the solution, cool to room temperature, centrifugally filter to obtain ferric hydroxide colloid, and then transfer to -10°C environment Sealed and frozen for 2 hours, and made into fine powder by ultra-fine pulverizer, and finally made into nano-powder by nano-grinder;

[0021] (2) Take 50 mL of water, 3.6 g of 30% hydrochloric acid solution, add 3.6 g of 3,3-dichlorobenzidine under stirring, continue stirring for 3 minutes, add 0.4 g of aminotriacetic acid, heat up to 90 ° C, stop heating, and stir After cooling to 40°C, 6.4 g of 30% hydrochloric acid was added, and the temperature was lowered to 0°C. Then add 6.4g of 30% sodium nitrite solution to carry out the diazotization reaction. The reaction process is completed within 2 minutes. After the reaction is completed, d...

Embodiment 2

[0028] (1) put 16.2gFeCl 3 , 24.2gFe(NO 3 ) 3 Add it into purified water, stir at 50-60°C until completely dissolved, add 4g NaOH, stir at 80-90°C for 1 hour, a large amount of colloids are precipitated in the solution, cool to room temperature, centrifugally filter to obtain ferric hydroxide colloid, and then transfer to -10°C environment Sealed and frozen for 2 hours, and made into fine powder by ultra-fine pulverizer, and finally made into nano-powder by nano-grinder;

[0029] (2) Take 50 mL of water, 3.6 g of 30% hydrochloric acid solution, add 3.6 g of 3,3-dichlorobenzidine under stirring, continue stirring for 3 minutes, add 0.4 g of aminotriacetic acid, heat up to 90 ° C, stop heating, and stir After cooling to 40°C, 6.4 g of 30% hydrochloric acid was added, and the temperature was lowered to 0°C. Then add 6.4g of 30% sodium nitrite solution to carry out the diazotization reaction. The reaction process is completed within 2 minutes. After the reaction is completed, d...

Embodiment 3

[0056] Utilize embodiment 1, embodiment 2 to make the powder coating with modified composite pigment yellow as raw material, and set without adding catalyst PdCl 2 Comparative example 1, the comparative example 2 using non-ionic surfactant OP-10 instead, the comparative example 3 of making powder coatings with 8323 yellow as raw material, and carry out relevant comparison to embodiment 1-2, comparative example 1-3 The coating performance test results are shown in Table 1.

[0057]Table 1 Performance testing of powder coatings

[0058]

[0059]

[0060] In Table 1, taking Comparative Example 3 as the standard product, the test data in Example 1-2 and Comparative Example 1-2 are all detected on the basis of the standard product. It can be found from the data in the table that the performance of the powder coating prepared by the modified and compounded pigment has been greatly improved.

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Abstract

The invention discloses a preparation method and application of modified composite pigment yellow, and relates to the technical field of fine chemical engineering. For the shortcomings of an existingorganic pigment, the organic pigment is compositely modified by adopting an inorganic core covering and surfactant treatment combined measure. According to the preparation method disclosed by the invention, positively charged ferric hydroxide colloid is used as an inorganic core; organic pigment molecules are well adsorbed around the inorganic core by using mutual attraction of positive and negative charges and the high adsorption performance of the surface of the colloid, so as to realize primary modification; then the ferric hydroxide colloid is converted into transparent iron yellow alpha-FeOOH through a catalyst PdCl2, so as to realize secondary modification of the organic pigment under the action of methylene sodium dinaphthalene sulfonate and lauryl sodium sulfate.

Description

Technical field: [0001] The invention relates to the technical field of fine chemicals, in particular to a preparation method and application of modified composite pigment yellow. Background technique: [0002] Organic pigments have a wide spectrum, bright colors, bright hues and various varieties, and are widely used in coatings, inks and plastics. However, the light stability, heat stability, solvent resistance, migration resistance, hiding power and other properties of most organic pigments are often inferior to those of inorganic pigments. Therefore, when organic pigments are used in coatings, there are often phenomena such as easy fading, easy floating, and weak tinting strength. It is particularly necessary to modify organic pigments so that they can better meet the use requirements. [0003] The diameter of ferric hydroxide colloidal particles is generally between 1nm and 100nm, which determines that the colloidal particles have a huge surface area and strong adsorpt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B67/22C09B29/085C09B29/01C09D5/03C09D7/41C09D7/62C09D167/00C09D163/00
CPCC09B67/0033C08K2003/2265C09B29/0003C09B29/0815C09D5/035C09D7/41C09D7/62C09D167/00C08L63/00C08K9/04C08K3/22
Inventor 费邦忠周正华查全达吴和平费邦能
Owner ANHUI HUAHUI SUYE TECH SHARE CO LTD
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